The Twins & Baldness Story
"The specific relationship between testosterone and hormonally induced hair loss in men was discovered by a psychiatrist early in this century. At that time, castration was commonly performed on patients with certain types of mental illness as it seemed to have a calming effect upon many patients and castration reduced the sex drive of patients who had no outlet for their desires. The doctor noted that the identical twin brother of one patient was bald while the mentally ill (castrated) twin had a full head of hair. The doctor decided to determine the effect of treating his patient with testosterone, which had recently become available in a purified form. He injected the hairy twin with testosterone to see what would happen. Within weeks, the hairy twin began to lose all but his wreath of permanent hair, just like his normal twin. The doctor, then, stopped giving the testosterone to see whether the process would be reversed, but the balding process continued and his patient never regained his full head of hair. It was apparent to him that eliminating testosterone will slow, or stop, further hair loss once it has begun, but it will not revive any dead follicles."